Main parts of the application:  EDITOR - enter here the expressions and read your results.  SYMBOLS - the list of linked math expressions.  MAIN BUTTONS - for interactions between the editor and the symbol list.  MAIN LOCK - to open application to show symbols and other features or to close it to simple calculator shape.  INSTANT VALUES - two windows to show instant values of variables and functions.  NUMERIC KEYPAD - for mouse input.  FUNCTIONS KEYPAD - for mouse input. The buttons have multiple functions.  JOG KNOB - for smooth adjustment.  VARIABLE BUTTONS - are shown dynamically. Mouse input of variable names.  FUNCTIONS BUTTONS - are shown dynamically. Mouse input of function names.  SPECIAL BUTTONS - for miscellaneous special functions.  The big image of the application (128kB)